[quote=@Nytem4re]
Key word can, but if built properly it wouldn't happen. Show me actual evidence that it could be, since government agencies seem convinced that a nuclear fission reactor wouldn't be. And this reactor gren had wouldn't exist in rl anyway, since it is small enough to fit into a human body.

And we still don't know the actual energy output it's giving.
[/quote]

Exactly the key word is can. And a school is not going to let anything into the school that has the potential to kill everyone in the school in seconds even if the likely hood is very remote. The fact that it [i]can[/i] is enough to not let him in.